BR0009649A - Process and apparatus for modulating and demodulating at least part of a synchronization signal in a mobile communication system - Google Patents

Process and apparatus for modulating and demodulating at least part of a synchronization signal in a mobile communication system

Info

Publication number
BR0009649A
BR0009649A BR0009649-0A BR0009649A BR0009649A BR 0009649 A BR0009649 A BR 0009649A BR 0009649 A BR0009649 A BR 0009649A BR 0009649 A BR0009649 A BR 0009649A
Authority
BR
Brazil
Prior art keywords
modulating
resulting
demodulating
communication system
mobile communication
Prior art date
Application number
BR0009649-0A
Other languages
Portuguese (pt)
Other versions
BRPI0009649B1 (en
Inventor
Branislav Popovic
Original Assignee
Ericsson Telefon Ab L M
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of BR0009649A publication Critical patent/BR0009649A/en
Publication of BRPI0009649B1 publication Critical patent/BRPI0009649B1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
    • H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
    • H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
    • H04L27/2078—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the phase change per symbol period is constrained
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70706—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation with means for reducing the peak-to-average power ratio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

"PROCESSO E APARELHO PARA MODULAR E PARA DEMODULAR PELO MENOS UMA PARTE DE UM SINAL DE SINCRONIZAçãO EM UM SISTEMA DE COMUNICAçãO MóVEL". Em uma concretização, um processo e aparelho para modulação de preâmbulo de Canal de Acesso Aleatório (RACH) são apresentados nos quais os componentes real (I) e imaginário (Q) de um preâmbulo RACH complexo (b(k)) são filtrados em correspondentes filtros modeladores de pulso (206,208). Conseq³entemente, as transições de fase no sinal resultante são limitadas em todas as posições de chip, e os códigos de quadrifase resultantes produzem sinais transmitidos com Relações de Potência de Pico para Média (PAPRs) mais baixas que aquelas que resultam usando esquemas de modulação de Chaveamento de Fase Híbrido (HPSK) convencionais. Por outro lado, o código de sincronização de quadrifase resultante retém a mesma magnitude de auto-correlação aperiódica de código binário original (a(k)), otimizada para produzir a mínima probabilidade de sincronização incorreta."PROCESS AND APPLIANCE FOR MODULATING AND DEMODULATING AT LEAST ONE PART OF A SYNCHRONIZATION SIGNAL IN A MOBILE COMMUNICATION SYSTEM". In one embodiment, a process and apparatus for modulating Preamble of Random Access Channel (RACH) are presented in which the real (I) and imaginary (Q) components of a complex RACH preamble (b (k)) are filtered into corresponding pulse shaping filters (206,208). Consequently, phase transitions in the resulting signal are limited at all chip positions, and the resulting quadriphase codes produce signals transmitted with Peak to Average Power Relations (PAPRs) lower than those that result using Switching modulation schemes. conventional Hybrid Phase (HPSK). On the other hand, the resulting four-phase synchronization code retains the same magnitude of aperiodic auto-correlation as the original binary code (a (k)), optimized to produce the minimum probability of incorrect synchronization.

BRPI0009649-0A 1999-04-08 2000-04-04 Method and apparatus for modulating and demodulating at least a portion of a synchronization signal in a mobile communication system. BRPI0009649B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/288,747 US6549564B1 (en) 1999-04-08 1999-04-08 Random access in a mobile telecommunications system
PCT/SE2000/000644 WO2000062436A1 (en) 1999-04-08 2000-04-04 Reduction of peak-to-average power ratio in a mobile telecommunications system

Publications (2)

Publication Number Publication Date
BR0009649A true BR0009649A (en) 2002-02-05
BRPI0009649B1 BRPI0009649B1 (en) 2015-07-21

Family

ID=23108477

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0009649-0A BRPI0009649B1 (en) 1999-04-08 2000-04-04 Method and apparatus for modulating and demodulating at least a portion of a synchronization signal in a mobile communication system.

Country Status (15)

Country Link
US (1) US6549564B1 (en)
EP (1) EP1166456B1 (en)
JP (1) JP3575752B2 (en)
KR (1) KR20020004992A (en)
CN (1) CN1192507C (en)
AR (1) AR023387A1 (en)
AT (1) ATE405996T1 (en)
AU (1) AU774324B2 (en)
BR (1) BRPI0009649B1 (en)
CA (1) CA2366591C (en)
DE (1) DE60039974D1 (en)
ES (1) ES2311454T3 (en)
MY (1) MY126030A (en)
TW (1) TW462149B (en)
WO (1) WO2000062436A1 (en)

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CA2686205C (en) * 2008-01-25 2011-11-29 Nautel Limited Peak-to-average power reduction method
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Also Published As

Publication number Publication date
CA2366591A1 (en) 2000-10-19
EP1166456B1 (en) 2008-08-20
US6549564B1 (en) 2003-04-15
BRPI0009649B1 (en) 2015-07-21
AU4161400A (en) 2000-11-14
MY126030A (en) 2006-09-29
JP3575752B2 (en) 2004-10-13
CN1192507C (en) 2005-03-09
WO2000062436A1 (en) 2000-10-19
CA2366591C (en) 2009-12-15
TW462149B (en) 2001-11-01
CN1364348A (en) 2002-08-14
KR20020004992A (en) 2002-01-16
EP1166456A1 (en) 2002-01-02
ATE405996T1 (en) 2008-09-15
JP2002542650A (en) 2002-12-10
ES2311454T3 (en) 2009-02-16
AR023387A1 (en) 2002-09-04
AU774324B2 (en) 2004-06-24
DE60039974D1 (en) 2008-10-02

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Legal Events

Date Code Title Description
B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 21/07/2015, OBSERVADAS AS CONDICOES LEGAIS.